Optical fiber interferometer with relaxed loop tolerance and...

Details Optical fiber interferometer with relaxed loop tolerance and... Optical fiber interferometer with relaxed loop tolerance and...

2007-08-07

2007-08-07

Font, Frank G. (Department: 2883)

Optical waveguides

With optical coupler

Particular coupling function

C385S001000, C385S002000, C385S003000, C385S024000, C385S039000, C380S277000, C356S450000, C356S491000

Reexamination Certificate

active

11284226

ABSTRACT:
An optical fiber interferometer (10) with relaxed loop tolerance, and a quantum key distribution (QKD) system (200) using same is disclosed. The interferometer includes two optical fiber loops (LP1and LP2). The loops have an optical path length (OPL) difference between them. A polarization-maintaining (PM) optical fiber section (60) of length (L60) and having fast and slow optical axes (AFand AS) optically couples the two loops. The length and fast-slow axis orientation is selected to introduce a time delay (ΔT1-2) between orthogonally polarized optical pulses traveling therethrough that compensates for the OPL difference. This allows for drastically relaxed tolerances when making the loops, leading to easier and more cost-effective manufacturing of the interferometer as well as related devices such as a optical-fiber-based QKD system.

REFERENCES:
patent: 6529601 (2003-03-01), Townsend

Affiliated with

Also associated with

Rating

Optical fiber interferometer with relaxed loop tolerance and... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical fiber interferometer with relaxed loop tolerance and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical fiber interferometer with relaxed loop tolerance and... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3854051